Kobo Forma “Screensaver” lock screen

I purchased a Kobo Forma a few weeks back. Like it so far. The buttons are a bit mushy. Here is my question?

Can you load a custom lock screen? The standard lock screen arrangement is not great. Choice one book covers, choice two Kobo logo. On my Forma the only lock screen is a Kobo/Walmart logo which is low res.

Could someone let me know if loading a custom lock screen is a possible? I have done some research but most info was at least old.